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Anurag Guda
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kubernetes on cloud
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‎README.md

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[![HitCount](http://hits.dwyl.com/angudadevops/k8s_aws.svg)](http://hits.dwyl.com/angudadevops/k8s_aws)
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[![HitCount](http://hits.dwyl.com/angudadevops/k8s-on-cloud.svg)](http://hits.dwyl.com/angudadevops/k8s-on-cloud)
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<h1> Kubernetes on AWS with Terraform </h1>
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<h1> Kubernetes on cloud with Terraform </h1>
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This repository helps to spin up AWS environment and create kubernetes cluster on top of that.
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‎terraform/Readme.md renamed to ‎terraform/aws/Readme.md

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‎terraform/aws.tf renamed to ‎terraform/aws/aws.tf

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‎terraform/output.tf renamed to ‎terraform/aws/output.tf

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‎terraform/variabels.tf renamed to ‎terraform/aws/variabels.tf

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‎terraform/azure/Readme.md

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<h1> Terraform on AWS </h1>
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For kubernetes multi node cluster we need to bring up multi nodes with help of terraform
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- Prerequisites
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- aws_access_key
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- aws_secret_key
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- aws_keypair_name
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Make sure to update these values on varaiable.tf to access your aws account
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If you want to modify any details like use another aws AMI, use variable.tf file to refer that
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### Usage
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Make sure to inititate the terraform to load all plugins
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```
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terraform init
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```
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Now verify the terrafor plan with below command
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```
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terraform plan
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```
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Once verify the plan, now apply the terraform state to aws account
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```
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terraform apply -auto-aprrove
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```
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To create a ansible inventory, run the below command . if you want to change the format of inventory file modify outputs.tf file.
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```
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terraform output inventory > ../ansible/inventory
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```
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‎terraform/azure/main.tf

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provider "azurerm" {
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version = "2.0.0"
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features {}
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}
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resource "azurerm_resource_group" "azure-terraform" {
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name = "acctestrg"
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location = "West US 2"
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}
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resource "azurerm_virtual_network" "azure-terraform" {
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name = "acctvn"
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address_space = ["10.0.0.0/16"]
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location = azurerm_resource_group.azure-terraform.location
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resource_group_name = azurerm_resource_group.azure-terraform.name
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}
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resource "azurerm_subnet" "azure-terraform" {
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name = "acctsub"
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resource_group_name = azurerm_resource_group.azure-terraform.name
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virtual_network_name = azurerm_virtual_network.azure-terraform.name
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address_prefix = "10.0.2.0/24"
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}
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resource "azurerm_public_ip" "master" {
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count = var.master_count
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name = "accpublicIP-master${count.index}"
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location = azurerm_resource_group.azure-terraform.location
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resource_group_name = azurerm_resource_group.azure-terraform.name
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allocation_method = "Dynamic"
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}
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resource "azurerm_public_ip" "worker" {
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count = var.worker_count
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name = "accpublicIP-worker${count.index}"
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location = azurerm_resource_group.azure-terraform.location
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resource_group_name = azurerm_resource_group.azure-terraform.name
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allocation_method = "Dynamic"
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}
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resource "azurerm_network_interface" "master" {
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count = var.master_count
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name = "acctni-master${count.index}"
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location = azurerm_resource_group.azure-terraform.location
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resource_group_name = azurerm_resource_group.azure-terraform.name
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ip_configuration {
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name = "testConfiguration"
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subnet_id = azurerm_subnet.azure-terraform.id
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private_ip_address_allocation = "dynamic"
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public_ip_address_id = azurerm_public_ip.master[count.index].id
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}
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}
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resource "azurerm_network_interface" "worker" {
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count = var.worker_count
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name = "acctni-worker${count.index}"
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location = azurerm_resource_group.azure-terraform.location
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resource_group_name = azurerm_resource_group.azure-terraform.name
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ip_configuration {
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name = "testConfiguration"
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subnet_id = azurerm_subnet.azure-terraform.id
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private_ip_address_allocation = "dynamic"
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public_ip_address_id = azurerm_public_ip.worker[count.index].id
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}
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}
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resource "azurerm_managed_disk" "worker" {
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count = var.worker_count
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name = "datadisk_existing-worker_${count.index}"
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location = azurerm_resource_group.azure-terraform.location
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resource_group_name = azurerm_resource_group.azure-terraform.name
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storage_account_type = "Standard_LRS"
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create_option = "Empty"
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disk_size_gb = "1023"
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}
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resource "azurerm_managed_disk" "master" {
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count = var.master_count
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name = "datadisk_existing-master_${count.index}"
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location = azurerm_resource_group.azure-terraform.location
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resource_group_name = azurerm_resource_group.azure-terraform.name
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storage_account_type = "Standard_LRS"
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create_option = "Empty"
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disk_size_gb = "1023"
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}
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# Create (and display) an SSH key
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resource "tls_private_key" "example_ssh" {
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algorithm = "RSA"
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rsa_bits = 4096
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}
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resource "azurerm_linux_virtual_machine" "master" {
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count = var.master_count
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name = "acctvm-master${count.index}"
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location = azurerm_resource_group.azure-terraform.location
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resource_group_name = azurerm_resource_group.azure-terraform.name
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network_interface_ids = azurerm_network_interface.master.*.id
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size = "Standard_B2s"
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# Uncomment this line to delete the OS disk automatically when deleting the VM
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# delete_os_disk_on_termination = true
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# Uncomment this line to delete the data disks automatically when deleting the VM
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# delete_data_disks_on_termination = true
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source_image_reference {
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publisher = "Canonical"
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offer = "UbuntuServer"
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sku = "18.04-LTS"
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version = "latest"
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}
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os_disk {
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name = "accdisk-master-${count.index}"
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caching = "ReadWrite"
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storage_account_type = "Premium_LRS"
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}
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disable_password_authentication = true
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admin_username = "azureuser"
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admin_ssh_key {
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username = "azureuser"
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public_key = tls_private_key.example_ssh.public_key_openssh
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}
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tags = {
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environment = "master"
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}
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}
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resource "azurerm_linux_virtual_machine" "worker" {
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count = var.worker_count
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name = "acctvm-worker${count.index}"
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location = azurerm_resource_group.azure-terraform.location
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resource_group_name = azurerm_resource_group.azure-terraform.name
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network_interface_ids = [element(azurerm_network_interface.worker.*.id, count.index)]
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size = "Standard_DS1_v2"
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# Uncomment this line to delete the OS disk automatically when deleting the VM
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# delete_os_disk_on_termination = true
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# Uncomment this line to delete the data disks automatically when deleting the VM
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# delete_data_disks_on_termination = true
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source_image_reference {
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publisher = "Canonical"
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offer = "UbuntuServer"
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sku = "18.04-LTS"
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version = "latest"
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}
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os_disk {
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name = "accdisk-worker-${count.index}"
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caching = "ReadWrite"
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storage_account_type = "Premium_LRS"
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}
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disable_password_authentication = true
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admin_username = "azureuser"
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admin_ssh_key {
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username = "azureuser"
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public_key = tls_private_key.example_ssh.public_key_openssh
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}
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tags = {
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environment = "worker"
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}
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}
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‎terraform/azure/output.tf

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output "tls_private_key" {
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value = tls_private_key.example_ssh.private_key_pem
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}
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data "template_file" "masters_ansible" {
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template = "$${host} ansible_ssh_host=$${host} ansible_ssh_port=22 ansible_ssh_user=azureuser ansible_ssh_private_key_file=/Users/aguda/Downloads/azure/azure.pem ansible_ssh_extra_args='-o StrictHostKeyChecking=no'"
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count = var.master_count
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vars = {
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host = "${azurerm_linux_virtual_machine.master[count.index].public_ip_address}"
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}
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}
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data "template_file" "workers_ansible" {
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template = "$${host} ansible_ssh_host=$${host} ansible_ssh_port=22 ansible_ssh_user=azureuser ansible_ssh_private_key_file=/Users/aguda/Downloads/azure/azure.pem ansible_ssh_extra_args='-o StrictHostKeyChecking=no'"
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count = var.worker_count
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vars = {
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host = "${azurerm_linux_virtual_machine.worker[count.index].public_ip_address}"
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}
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}
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data "template_file" "inventory" {
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template = "\n[k8s-masters]\n$${masters}\n\n[k8s-workers]\n$${workers}"
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vars = {
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masters = "${join("\n",data.template_file.masters_ansible.*.rendered)}"
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workers = "${join("\n",data.template_file.workers_ansible.*.rendered)}"
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}
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}
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output "inventory" {
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value = "${data.template_file.inventory.rendered}"
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}

‎terraform/azure/variables.tf

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variable "worker_count" {
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default = 2
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}
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variable "master_count" {
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default = 1
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}

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